This paper focuses on the evolution of the book format from print to digital medium, exploring three main topics: the overcoming of the idea of the page frame, the influence of mobile and GPS technology on book features and the application of virtual and augmented reality within the print format. For each topic, the analysis looks back to Nineteenth Century Avant-garde anticipations of the digital book. These considerations on the Avant-gardes are considered the starting point of the current digital revolution in book publishing and the literary field.